Tool for removing and replacing valve guides



Sept. 25,1923. 1,468,777

S. M. EDWARDS TOOL FOR REMOVING AND REPLACING VALVE GUIDES Filed Feb.2'7, 1922 19 1? '5 3 y w 4 Q 50/ 6 5 J: I. .10 15 11 a Patented Sept.25, 1923.

entree stares 'sAMUnL nn'waans, or nnrnorryiaronic-nn.

TooL ron nnmovrnet ND Enenaorne VALVE- GUIiDES.

Application filcd February 27, $22. e m; 539,746., 1

. T0 aZZ whom it may concern:

Be it known that-I, sm ar M. Enwanns, a citizen of the United States,IQSICllIIg at I Detroit,rcounty Wayne, and State. of

'Michigan, have invented a new and useful Improvement in a Tool forRemoving and Replacing Valve Guides,rof which the followmgis aspecification, referencebeing Internal combustion engines are providedwith a series of valves known as intake and exhaust valves, the purposeof which is to alternately open and close the passageways between thegas intake and the cylinderand the exhaust passageway and the cylinderrespectively. These valves are provided with guides or bearings withinwhich they are adapted to move. I I

It is oftentimes desirable to remove these valve guides or bearingsandthe removal of the same is a somewhat diflicult and tedious operationowing to the fact that it is necessary to remove the cylinder blockfrom'its setting inorder to take out the valve guide or bearing. It isalso very difliculttoremove these guides or bearings without crackingorotherwise damaging the cylinder block.

It is the prime object of my invention to provide a device adapted toremove the valve guides or bearings withoutthe neces sity of removingthe cylinder from its setting and without the danger of otherwisedamaging the cylinder block.

It is a further object of my invention to provide such a device adaptedto be used in replacing the valve guide or bearing in its normalposition. 7

It is a further object of my invention to provide such a device of cheapand sim le construction and one which may be easlly operated by a noviceso that the work may be done by the ordinary individual in his owngarage without the necessity of taking his automobile to a repair shop.

My invention consists in the arrangement, combination and constructionof the various parts of my improved device as described in thespecification, claimed in my claim and shown in the accompanyingdrawings, in which,

F ig. 1 is a sectional view ofa cylinder block of an internal combustionengine with certain parts broken away and showing my improved device inplace. i

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1 and 111 hadtherein to the accompanying drawings.

' Fig. 3 is av sectional view taken on .';-line v f HI have i shown aconventional. cylinder block 1, with the main portion thereof out awaybut. showing the location ofthe valves 2,;the valve seats 3-and thevalve guidesgl 7 thereon, f the construction of my-fimproved device, Iprovide a tubular member 5. with a rod 6 extending therethrough andhaving on one end thereof a head 7. The head 7 has a knurled'face 15, asshown in Fig. 3. iThe opposite end of the rod 6 'is screw threaded as at8 and the nut 9 is adapted to be screwed thereon against the washer10.which latter member bears against the face 11 of the tubular member5.

In the practical operation ofmyfimproved device as a, valve guide pulleror remover, the valve 2 is removed in the ordinary way from the cylinderblock 1- and the lower'end 12' of the tubular member 5 is placed againstthe cylinder block 1 directly under and around the head 13 of the valveguide 'or-fio, bearing 4. The rod 6 is inserted through the pocket 14 inthe top of the cylinderblock and the aperture 17 inthe end of thetubularmember 5 until the knurled side 15 of the head? rests against theend of the valve guide 4;. The washer 10, and the nut 9. are then placedover the opposite end of the rod 6 and the nut 9 is screwed inwardly,thus causing a downward pressure upon the valve guide 1 by. the head andforcing the valve 0 guide 4; downwardly and out of the cylinder block 1.The knurled portion 15 of the head 7 on the rod 6 prevents the rod 6from turning when the nut 9v is screwed inwardly.

When it is desired to use my improved 95 Y device in replacing the valveguide 4 in the cylinder head 1, the tubular member 5 is placed in thepocket 14:, therod 6 is inserted through the valve guide 4 and, thepassageway 16 and the pocket 14, until it emerges 1 through the opening'17 in the top of the tubular member 5.

The washer 10 and the nut 9 are then placed on the end thereof andscrewed inwardly as when the valve guide was being removed with theresult that the valve will be pulled upwardly through the passageway 16into its normal position.

For the purpose of holding. my device in operating position while thevalve guide 1s being removed or replaced, I provide a I handle 18 whichmay begrasped with one hand by the operator and the device thus steadiedWhile in use.

Owing to the construction of cylinder blocks on certaintypes ofautomobiles, it is sometimes necessary that the tubular member 5 be cutaivay as at and the portion 19 removed in order for it to be used. Thesloping'side of the tubular member 5 which is left by the cutting awayof the portion 19 as at 20, may bear against the side of the cylinderblock and thus provide a bearing surface for the device in addition tothe bottom thereof.

It is obvious that some changes may be made in the arrangement andconstruction of the variousparts of my improved device Without departingfrom the spirit of my invention and it is my intention to cover bymyclaim such changes as maybe reasonably included within the scopethereof.

What I claim is:

A device of the class described comprising a member adapted to bearagainst an engine cylinder block and to be positioned adjacent a valveuide in said block, a rod extending "througl said valve guide and saidfirst mentioned member and havinga said nut on, said rodwill cause thedis placement of said valve guide, and a handle on-said first memberwhereby the same may be held in a desired position. i V

SAMUEL M. EDWARDS.

